CN113883791B

CN113883791B - Refrigerator

Info

Publication number: CN113883791B
Application number: CN202010635243.8A
Authority: CN
Inventors: 杨廷超; 蒋孝奎; 刘修东; 王宁
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2022-12-20
Anticipated expiration: 2040-07-03
Also published as: CN113883791A

Abstract

The invention provides a refrigerator, which comprises a refrigerator body with an inner container and a door body matched with the refrigerator body, wherein the door body is provided with a door liner, a storage space is formed between the door liner and the inner container, the door liner is provided with a door liner plate and a liner frame which extends backwards from the door liner plate to the inner side of the inner container, the refrigerator also comprises an air bag which is arranged between the inner container and the liner frame to seal the storage space, a fixing piece for fixing the air bag and an air pump matched with the air bag, the fixing piece is provided with a deformation part which covers the outer side of the air bag and is elastically deformed along with the air bag, and a fixing part which is connected with the deformation part to be fixed on the inner container or the liner frame. The invention can not only improve the sealing effect of the refrigerator, but also simplify the installation and fixation of the air bag, and simultaneously the deformation part can also protect the air bag from being damaged easily, thereby prolonging the service life of the air bag.

Description

Refrigerator with a door

Technical Field

The invention relates to a refrigerator, in particular to a refrigerator with an air bag which is easy to install and not easy to damage.

Background

The existing refrigerator heat preservation is mainly characterized in that a door seal is arranged on a door body to seal with a refrigerator body, the problem that the door seal is still cold leakage exists only by sealing the door seal, the heat load of the door seal approximately accounts for about 20% of the heat load of the whole refrigerator, at present, part of refrigerators are provided with auxiliary airbags added to be matched with the door seal to increase the sealing effect, the heat load is reduced, however, the existing airbags are difficult to assemble, and when the door body is opened, the airbags are exposed in the sight of a user, the attractiveness is poor, the friction is easy to occur, and the service life of the airbags is shortened.

In view of the above, there is a need for an improved refrigerator to solve the above problems.

Disclosure of Invention

The invention aims to provide a refrigerator with an air bag which is simple to mount and is not easy to damage.

In order to achieve the purpose, the invention provides a refrigerator, which comprises a refrigerator body with an inner container, and a door body matched with the refrigerator body, wherein the door body is provided with a door liner, a storage space is formed between the door liner and the inner container, the door liner is provided with a door liner plate and a liner frame which protrudes backwards from the door liner plate to the inner side of the inner container, the refrigerator also comprises an air bag which is arranged between the inner container and the liner frame to seal the storage space, a fixing piece for fixing the air bag and an air pump matched with the air bag, the fixing piece is provided with a deformation part which covers the outer side of the air bag and is elastically deformed along with the air filling and discharging of the air bag, and a fixing part which is connected with the deformation part to be fixed on the inner container or the liner frame.

As a further improvement of the invention, the airbag is fixed on the liner, a groove and a fixing structure are formed at the position of the liner adjacent to the lining frame, the airbag is contained in the groove, and the fixing piece is fixed outside the airbag through the matching of the fixing part and the fixing structure.

As a further improvement of the invention, the liner is provided with an inner wall adjacent to the lining frame, and the outer wall of the fixing piece adjacent to the lining frame is flush with the inner wall of the liner in a door opening state.

As a further improvement of the present invention, the airbag is an inner airbag, the fixing member is an outer airbag wrapped around the outer side of the inner airbag, the fixing structure is a fixing groove formed by further recessing from the bottom in the groove, and the portion of the outer airbag except the fixing portion is semicircular in shape in the initial state of opening the door.

As a further improvement of the invention, the inner container is provided with an inner container body and a connecting piece fixed at the front end of the inner container body, and the groove and the fixing structure are formed on the connecting piece.

As a further improvement of the invention, the box body is provided with a shell, the connecting piece is provided with a liner fixing end fixed with the liner body and a shell fixing end fixed with the shell, and the connecting piece, the shell and the liner body form a foaming cavity together.

As a further improvement of the invention, the connecting piece is annularly arranged along the liner body, the lining frame is formed by protruding backwards from the periphery of the door lining plate, and the air bag is annularly arranged corresponding to the connecting piece and the lining frame; the annular air bag is of a multi-section structure, two adjacent sections are communicated with each other through air holes, and the inner diameter of each air hole is smaller than that of each section of the air bag.

As a further improvement of the invention, the lining frame is provided with a matching wall matched with the air bag, and the matching wall is concavely provided with a sealing groove matched with the air bag.

In a further improvement of the present invention, the elastic modulus of the airbag is greater than the elastic modulus of the deformation portion, and the deformation portion is made of an abrasion resistant material.

In a further improvement of the present invention, the case has a frame opening, the door body has a seal portion formed on an outer side of the lining frame so as to face the frame opening, and the seal portion has a door seal.

The invention has the beneficial effects that: according to the refrigerator, the fixing piece for fixing the air bag is arranged, the fixing piece is provided with the deformation part which covers the outer side of the air bag and is elastically deformed along with the inflation and deflation of the air bag, and the fixing part which is connected with the deformation part and is fixed on the liner or the lining frame, so that the sealing effect of the refrigerator can be improved, the installation and the fixation of the air bag are simpler, meanwhile, the deformation part can protect the air bag from being easily damaged, and the service life of the air bag is prolonged.

Drawings

Fig. 1 is a perspective view schematically illustrating a refrigerator according to the present invention.

Fig. 2 is an exploded side view of the refrigerator of the present invention.

Fig. 3 is an exploded perspective view of the refrigerator of the present invention.

Fig. 4 is a sectional view of an air bag for a refrigerator according to the present invention.

Fig. 5 is an exploded sectional view of the fixing member and the inner container.

Fig. 6 is a sectional view of another embodiment of the air bag for a refrigerator of the present invention.

Fig. 7 is a cross-sectional view of the balloon of fig. 6 after inflation.

Fig. 8 is a sectional view of a second embodiment of a refrigerator door liner of the present invention.

Fig. 9 is a cross-sectional view of the balloon of fig. 8 after inflation.

Fig. 10 is a sectional view of a third embodiment of a refrigerator door liner of the present invention.

Fig. 11 is a sectional view of a fourth embodiment of a refrigerator door liner of the present invention.

Fig. 12 is a sectional view of a fifth embodiment of a refrigerator door liner of the present invention.

Fig. 13 is a sectional view of the inside of an evaporation chamber of a refrigerator according to the present invention.

Fig. 14 is an enlarged view at a in fig. 13.

Fig. 15 is a flowchart of a control method of a refrigerator of the present invention.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the accompanying drawings. The present invention is not limited to the embodiment, and structural, methodological, or functional changes made by one of ordinary skill in the art according to the embodiment are included in the scope of the present invention.

Referring to fig. 1 to 15, an embodiment of a refrigerator according to the present invention is shown, the refrigerator includes a refrigerator body 1 having an inner container 11, a door body 2 engaged with the refrigerator body 1, the door body 2 has a door liner 21, a storage space 12 is formed between the door liner 21 and the inner container 11, the door liner 21 has a door liner 211 and a liner 212 protruding from the door liner 211 to an inner side of the inner container 11, wherein the refrigerator further includes an air bag 3 disposed between the inner container 11 and the liner 212 to seal the storage space 12, a fixing member 4 fixing the air bag 3, and an air pump 5 engaged with the air bag 3, the fixing member 4 has a deformation portion 41 covering an outer side of the air bag 3 and elastically deforming with the air bag 3, and a fixing portion 42 connected to the deformation portion 41 to be fixed to the inner container 11 or the liner 212.

Specifically, as shown in fig. 1 to 5, in the present embodiment, the door opening side of the refrigerator is described as being located on the left side, but in other embodiments, the door opening side may be located on the right side. As shown in fig. 1, the door body 2 is not shown with a door shell, and only the door liner 21 is shown. The lining frame 212 protrudes backwards from the periphery of the door lining plate 211, and the airbag 3 is mainly used for sealing the inner wall 115 of the liner 11 and the lining frame 212, so that the sealing effect is further enhanced. Of course, the airbag 3 may be disposed in a ring shape in cooperation with the inner wall 115 and the cushion frame 212, or may be disposed only at a partial position between the inner wall 115 and the cushion frame 212.

In this embodiment, the lining frame 212 has a fixing wall 213 located on the inner side and a fitting wall 214 located on the outer side, the fixing wall 213 is mainly used for arranging a bottle seat, the airbag 3 is located between the fitting wall 214 and the inner wall 115 of the inner container 11 to seal the storage space 12, and the door body 2 further has a sealing portion 22 extending from the front side of the fitting wall 214 in the lateral direction.

In this embodiment, the case 1 is further formed with a frame opening 13 at the front side thereof, the sealing portion 22 is provided with a door seal 23 capable of being attached to the frame opening 13, the door seal 23 can not only seal the storage space 12, but also fix the door 2 and the case 1, and then the airbag 3 is combined to seal the inner wall 115 of the inner container 11 and the lining frame 212, i.e., the only contact surfaces (the sealing portion 22 and the matching wall 214) of the door 2 and the case 1 are sealed, so that the sealing effect can be further improved, and the influence of the external environment on the temperature in the storage space 12 can be reduced.

The door gasket 23 includes a fixing leg 231 fixed to the sealing portion 22, and a sealing body 232 extending backward from the fixing leg 231, wherein the sealing body 232 has a main air chamber and an auxiliary air chamber disposed adjacently, and a magnetic element is disposed in the main air chamber or the auxiliary air chamber to be attracted and matched with the magnetic element on the frame opening portion 13, so as to maintain the closed state of the door body 2.

Because the outer casing 14 of the box body 1 is made of metal material, and the front side of the outer casing 14 is provided with a bending edge, the bending edge is a magnetic element, and therefore, the magnetic element can be directly adsorbed on the bending edge. Certainly, in order to reduce the production cost and reduce heat exchange, a magnetic element is not arranged in the main air chamber or the auxiliary air chamber, and a further deformation space of the door seal is provided by the air chamber provided with the magnetic element, so that the sealing effect is improved. (this structure can be realized by matching with the structure of the lining frame 212 or the structure of the inner container 11, see the following embodiments for details)

In this embodiment, the airbag 3 is fixed on the inner container 11, specifically, on the inner sidewall of the inner container 11 adjacent to the lining frame 212, a groove 111 and a fixing structure 112 are formed on the inner container 11 at a position adjacent to the matching wall 214, the airbag 3 is accommodated in the groove 111, and the fixing member 4 is fixed outside the airbag 3 by matching the fixing structure 112 with the fixing portion 42. Of course, in other embodiments, the lining frame 212 may also be provided with a groove 111 and a fixing structure 112 for accommodating the airbag 3.

Specifically, in this embodiment, the liner 11 has a liner body 113 and a connecting member 114 fixed at the front end of the liner body 113, the groove 111 and the fixing structure 112 are formed on the connecting member 114, and since the liner 11 is usually formed by vacuum forming, it is not easy to set the fixing structure 112 on the surface thereof, and therefore, by setting the connecting member 114 at the front end of the liner body 113, the groove 111 and the fixing structure 112 are conveniently set on the connecting member 114, thereby facilitating the assembly of the fixing member 4.

The connecting member 114 is generally a plastic member and is disposed around the front end of the inner container body 113, in this embodiment, the fixing structures 112 are disposed on the front and rear sides of the groove 111, and each fixing structure 112 has a slot 1121 recessed from the surface of the connecting member 114 and a limiting slot 1122 disposed on one side of the slot 1121.

The connecting member 114 further has a liner fixing end 1141 connected to the rear fixing structure 112 to be fixed to the liner body 113, and a case fixing end 1142 connected to the front fixing structure 112 to be fixed to the metal case 14 of the case 1, wherein the liner fixing end 1141 extends rearward, and the case fixing end 1142 extends outward along the transverse direction, so that the connecting member 114, the liner body 113 and the case 14 together form a foaming chamber. In this embodiment, the connecting member 114 can bond the inner container fixing end 1141 to the inner container body 113 through an adhesive, and the outer container fixing end 1142 is fixed by matching with the U-shaped groove of the outer container 14, but in other embodiments, the connecting member 114 can also be provided with a matching structure fixed with the inner container body 113.

In this embodiment, the fixed part 42 of mounting 4 set up respectively in both sides around the department of deformation 41, so that with recess 111 and fixed knot construct 112 cooperate, wherein, the department of deformation 41 with the plastic that the fixed part 42 is different materials respectively forms through soft or hard crowded technology altogether, and the department of deformation 41 adopts the material that extremely easily warp promptly, and fixed part 42 adopts non-deformable's material, realizes the common shaping of different materials through soft or hard crowded altogether, has improved the production efficiency of mounting 4. Of course, in other embodiments, the deformation portion 41 may be formed separately and assembled with the fixing portion 42 to form the fixing member 4.

In the present embodiment, the elastic modulus of the deformation portion 41 is smaller than that of the airbag 3, and the larger the elastic modulus, i.e., the larger the rigidity, i.e., the less likely to deform, so that the deformation portion 41 is more likely to deform relative to the airbag 3, i.e., the deformation portion 41 deforms immediately as long as the airbag 3 exerts a force on the deformation portion 41, on one hand, the inflation amount of the airbag 3 is easily controlled, and on the other hand, damage to the airbag 3 due to over inflation of the airbag 3 can be avoided. Moreover, the deformation portion 41 is made of a wear-resistant material, so that the deformation portion 41 is not easily damaged by friction with the lining frame 212 even in a long-term use process.

The fixing portion 42 has a hook 421 and a position-limiting portion 422, which are engaged with the slot 1121 and the position-limiting slot 1122 of the fixing structure 112, wherein the hook 421 and the slot 1121 are engaged to realize positioning in a transverse direction. The limiting portion 422 is engaged with the limiting groove 1122, so that the fixing effect of the hook 421 and the engaging groove 1121 can be further enhanced.

On the other hand, in the long-term use process of the refrigerator, the risk that the hook 421 is damaged due to the fact that the deformation part 41 is often deformed and the fixing part 42 is pulled is reduced, and meanwhile, the refrigerator is convenient to install. Therefore, by arranging the fixing member 4, the airbag 3 does not need to be additionally provided with the fixing structure 112, the airbag 3 only needs to be placed in the groove 111, and then the fixing member 4 is installed, so that the installation is simple and efficient.

The inner container 11 has an inner wall 115 adjacent to the lining frame 212, and in the door-open state, the outer wall (i.e., the deformation portion 41) of the fixing member 4 adjacent to the lining frame 212 is flush with the inner wall 115 of the inner container 11, that is, the airbag 3 is not inflated and the deformation portion 41 is in an undeformed state. At this time, the door 2 can be opened and closed smoothly without interference of the deformation portion 41.

In this embodiment, the lining frame 212 protrudes backward from the periphery of the door lining board 211, that is, the lining frame is disposed around the inner wall 115 of the inner container 11, and the airbag 3 is also disposed in a ring shape corresponding to the connecting member 114 and the lining frame 212; the annular air bag 3 can be arranged in a multi-section structure (not shown), two adjacent sections are communicated with each other through an air hole, and the inner diameter of the air hole is smaller than that of each section of the air bag 3. Each section of the air bag 3 is communicated through the air hole, so that the air convection in the air bag 3 can be effectively reduced, the heat exchange efficiency is obviously reduced, and the influence on the temperature in the storage space 12 is reduced.

In this embodiment, the matching wall 214 extends obliquely from back to front and towards the inner wall 115 of the inner container 11, which is for facilitating the door liner 21 to be demolded from the plastic sucking male mold, but in other embodiments, the matching wall 214 may also extend in a direction perpendicular to the door liner 211, and in order to further enhance the sealing effect of the airbag 3, the matching wall 214 is further provided with a sealing groove 24 matching with the airbag 3 in a concave manner. By arranging the sealing groove 24, the sealing area of the air bag 3 is increased, on one hand, the sealing effect is increased, on the other hand, the friction force between the air bag 3 and the matching wall 214 is increased, the forward component force generated when the air bag 3 is pressed on the matching wall 214 is reduced, and the door body 2 is prevented from being opened.

Specifically, the fitting wall 214 has at least two groove walls forming the sealing groove 24, and the more the groove walls forming the sealing groove 24 are, the larger the sealing area with the airbag 3 is, the better the sealing effect is, and the larger the friction force is, the less the door 2 is opened. In the present embodiment, the sealing groove 24 is disposed around the matching wall 214, so as to match with the annular bladder 3 to increase the sealing effect. Of course, in other embodiments, the sealing groove 24 may be disposed at a local position of the mating wall 214, such as some places where cold leakage is easy, for example, at a position close to the opening side of the door body 2.

As shown in fig. 4, in the first embodiment of the door liner 21 of the refrigerator according to the present invention, the matching wall 214 has a first groove wall 241 and a second groove wall 242 which form the sealing groove 24 and are connected in a front-to-back manner, the first groove wall 241 is located at the rear side of the second groove wall 242, the first groove wall 241 is formed by extending from the matching wall 214 vertically toward the door liner 211, and the second groove wall 242 is formed by extending from the end of the first groove wall 241 toward the inner wall 115 of the inner container 11 adjacent to the matching wall 214 in an inclined manner.

Therefore, neither the first groove wall 241 nor the second groove wall 242 extends obliquely forward away from the inner wall 115 of the inner container 11 adjacent to the matching wall 214, and the door lining 21 is generally formed mainly by plastic suction, and a plastic suction male mold is adopted, so that when the door lining 21 is removed from the mold, no other external force is applied to prevent the upward movement except for the friction force between the door lining 21 and the surface of the male mold during the upward movement, and the male mold is smoother, and meanwhile, the sealing effect is increased.

When the airbag 3 is inflated, it may contact both the first groove wall 241 and the second groove wall 242, or may contact only one of them, wherein it is preferable that the airbag 3 contacts only the first groove wall 241 because the first groove wall 241 is formed to extend vertically toward the door liner 211, and the acting force of the airbag 3 on the first groove wall 241 has no forward component, so that the door opening force is not generated.

As shown in fig. 8 and 9, in the second embodiment of the door liner 21 of the refrigerator according to the present invention, the fitting wall 214 has a first groove wall 241 and a second groove wall 242 which form the sealing groove 24 and are connected in a front-to-rear direction, the first groove wall 241 is formed by extending obliquely forward from the fitting wall 214 in a direction away from the inner wall 115 of the inner container 11 adjacent to the fitting wall 214, that is, toward the door liner 211, and the second groove wall 242 is formed by extending obliquely forward from the end of the first groove wall 241 in a direction toward the inner wall 115 of the inner container 11 adjacent to the fitting wall 214.

Specifically, in this embodiment, an acute included angle between the first groove wall 241 and a horizontal line along the front-rear direction is greater than an acute included angle between the second groove wall 242 and a horizontal line along the front-rear direction. Since the bladder 3 is in contact with both the first and

second groove walls

241, 242 when the bladder 3 is sealed.

Therefore, on the one hand, the acute angle included angle between the first groove wall 241 and the horizontal line along the front-rear direction is large, and the component force of the acting force of the airbag 3 on the first groove wall 241 in the backward direction is large, so that the door closing force can be formed to a certain extent, and the door body 2 is prevented from opening. On the other hand, the acute angle included angle between the second groove wall 242 and the horizontal line along the front-back direction is smaller, the forward component force of the air bag 3 on the second groove wall 242 is smaller, the door opening force can be reduced to a certain extent, and the door body 2 can be prevented from being opened under the action of the air bag 3 by matching with the fixing action of the door seal 23.

Further, the length of the first groove wall 241 is smaller than that of the second groove wall 242, and when the door liner 21 is demolded, since the first groove wall 241 is formed to extend obliquely forward from the mating wall 214 in a direction away from the inner wall 115 of the inner container 11 adjacent to the mating wall 214, assuming that an included angle between the first groove wall 241 and a horizontal line in the transverse direction is a and the length of the first groove wall 241 is a, the first groove wall 241 must move a distance of a × cosA in the transverse direction to smoothly demold the door liner 21, and the smaller the length a of the first groove wall 241, the smaller the value of a × cosA, and the easier demold is.

In order to solve the problem that the air bag 3 generates the door opening force to the door liner 21 and further enable the air bag 3 to generate the door closing force to the door liner 21, the invention also provides a design which is a third embodiment of the door liner 21 of the refrigerator as shown in fig. 10.

The airbag 3 is annularly arranged in cooperation with the lining frame 212, the airbag 3 is fixedly arranged on one of the liner 11 and the lining frame 212, and a limiting wall matched with the airbag 3 in a closed state of the door body 2 is formed on the other one of the liner 11 and the lining frame 212, the limiting wall extends from outside to inside in the transverse direction (namely, the limiting wall extends forwards in an inclined manner towards a direction far away from the inner wall 115 of the liner 11 adjacent to the matching wall 214), and the limiting wall also extends forwards in an inclined manner from back to back. For convenience of description, the limiting wall is referred to as a first groove wall 241 hereinafter.

In the present embodiment, the airbag 3 is fixed to the inner wall 115 of the inner bag 11 (see the above-mentioned portion in detail), the first groove wall 241 is formed on the mating wall 214, specifically, the first groove wall 241 may be the mating wall 214, or may be a partial structure on the mating wall 214, and when the first groove wall 241 is the mating wall 214, the sealing portion 22 is formed to extend in the lateral direction from the front side of the first groove wall 241.

When the airbag 3 is inflated, the acting force of the airbag 3 on the first groove wall 241 has a backward component force, which can fix the door body 2 to the box body 1, i.e. a door closing force. When the included angle between the first groove wall 241 and the horizontal line along the front-back direction is larger, the door closing force is larger, the fixing effect of the door body 2 is better, and the demolding is difficult. And when the first groove wall 241 is the mating wall 214, i.e. there is no need to provide the remaining structure on the mating wall 214, it is also relatively simple when designing the male mold.

Of course, in other embodiments, the airbag 3 is fixed to the lining frame 212, and the first groove wall 241 is formed on the inner wall 115 of the inner container 11, and when the airbag 3 inflates, the first groove wall 241 can prevent the airbag 3 from moving forward, so as to prevent the door body 2 from opening.

As shown in fig. 11, is a fourth embodiment of a door liner 21 of a refrigerator of the present invention.

The matching wall 214 is formed with a sealing groove 24 matching with the airbag 3, and the matching wall 214 has at least two groove walls forming the sealing groove 24, wherein at least one groove wall is the limiting wall. When the air bag 3 is inflated and expanded, the air bag and the limit wall are matched to seal the storage space 12. This is because the direction of the force generated by the airbag 3 on the position-limiting wall is perpendicular to the contact surface of the groove wall, so that the force has a component force in the backward direction, and finally the door body 2 is closed more firmly, that is, a door closing force is generated.

In this embodiment, the matching wall 214 has a limiting wall (i.e., a first groove wall 241) and a connecting wall (i.e., a second groove wall 242) that form the sealing groove 24 and are connected in a front-back manner, where the limiting wall is a rear inner wall of the sealing groove 24, and the connecting wall is a front inner wall of the sealing groove 24, and for convenience of description, the limiting wall is referred to as the first groove wall 241 and the connecting wall is referred to as the second groove wall 242.

The second groove wall 242 extends obliquely forward from the end of the first groove wall 241 toward the inner wall 115 of the inner container 11 adjacent to the matching wall 214, in this embodiment, the airbag 3 is only matched with the first groove wall 241 after being inflated to seal the storage space 12, because the airbag 3 is only contacted with the first groove wall 241, only the door closing force can be generated, and in other embodiments, the airbag 3 can also be contacted with the second groove wall 242, and only the forward component force (i.e. the door opening force) of the acting force of the airbag 3 on the second groove wall 242 needs to be ensured to be smaller than the door closing force.

The position of the sealing groove 24 may be formed at the middle position of the matching wall 214, and certainly may also be formed at the rear end of the matching wall 214, that is, the matching wall 214 is formed by extending from the front end of the second groove wall 242. The former matching wall 214 surface has four bending edges from back to front, which specifically comprises: front mating wall 214, first slot wall 241, second slot wall 242, and rear mating wall 214. The mating wall 214 surface of the latter has three bending edges from back to front, specifically: a first slot wall 241, a second slot wall 242, and a mating wall 214. The shapes of the plastic suction convex dies corresponding to different bending edges are different, and the plastic suction convex dies can be selected according to actual production.

In this embodiment, the length of the first groove wall 241 is greater than that of the second groove wall 242, and the first groove wall 241 is set long enough to ensure that the airbag 3 is only in contact with the first groove wall 241 after being inflated and is sealed, but not in contact with the second groove wall 242, so that an acting force is not applied to the second groove wall 242, and a forward door opening force is not generated, so that only a door closing force is generated, and the door body 2 is ensured to be closed more firmly.

An acute angle between the first groove wall 241 and a horizontal line along the front-rear direction is smaller than an acute angle between the second groove wall 242 and a horizontal line along the front-rear direction. The included angle between the first groove wall 241 and the horizontal line in the front-back direction is smaller as much as possible, and the included angle is more parallel to the horizontal line in the front-back direction, so that the resistance is smaller in the demolding process, the demolding is easier, and the production efficiency is improved.

Stated differently, the included angle between the first groove wall 241 and the horizontal line in the transverse direction is larger, and similarly, assuming that the included angle between the first groove wall 241 and the horizontal line in the transverse direction is a, and the length of the first groove wall 241 is a, the first groove wall 241 must move a distance a × cosA in the transverse direction to smoothly demold the door lining 21, and the larger the value of the included angle a, the smaller the value of a × cosA, and the easier the demold of the door lining 21.

In order to further reinforce the air bag 3, a door closing force can be generated on the door liner 21, as shown in fig. 12, which is a fifth embodiment of the door liner 21 of the refrigerator according to the present invention.

The matching wall 214 has a limiting wall and a connecting wall which form the sealing groove 24 and are connected back and forth, (for convenience of description, the limiting wall and the connecting wall are still referred to as a first groove wall 241 and a second groove wall 242), the first groove wall 241 is formed by extending the matching wall 214 obliquely and forwards in a direction away from the inner wall 115 of the inner container 11 adjacent to the matching wall 214, the second groove wall 242 is formed by extending the second groove wall 242 obliquely and forwards in a direction away from the inner wall 115 of the inner container 11 adjacent to the matching wall 214 from the end of the first groove wall 241, and the airbag 3 is inflated to be matched with the first groove wall 241 and the second groove wall 242 to seal the storage space 12.

In this embodiment, the sealing groove 24 is formed by being recessed from the middle of the matching wall 214, and the matching wall 214 extends from the back to the front and slantly towards the inner wall 115 of the inner container 11, therefore, the matching wall 214 further has a front wall forming the sealing groove 24, the front wall is connected to the front end of the second groove wall 242, for convenience of description, the front wall is hereinafter referred to as a third groove wall 243, and the third groove wall 243 is formed by extending forwards from the end of the second groove wall 242 and slantly towards the inner wall 115 of the inner container 11 adjacent to the matching wall 214, and is connected to the matching wall 214 at the front end.

In this embodiment, when the airbag 3 inflates, it only contacts the first groove wall 241 and the second groove wall 242, but not the third groove wall 243, and the third groove wall 243 is mainly used to connect the front end of the mating wall 214, so that the door opening force is not generated, and only the door closing force is generated, thereby ensuring that the door 2 is closed more firmly. Of course, in other embodiments, the airbag 3 may contact the third groove wall 243 after being inflated, and it is only necessary to ensure that the forward component of the acting force (i.e., the door opening force) of the airbag 3 on the third groove wall 243 is smaller than the door closing force generated by the first groove wall 241 and the second groove wall 242.

In this embodiment, an acute angle between the first groove wall 241 and a horizontal line along the front-rear direction is greater than an acute angle between the second groove wall 242 and a horizontal line along the front-rear direction.

Because when the airbag 3 is sealed, the airbag 3 contacts both the first groove wall 241 and the second groove wall 242, on one hand, the acute included angle between the first groove wall 241 and the horizontal line along the front-back direction is relatively large, and the force component of the airbag 3 applied to the first groove wall 241 in the backward direction is relatively large, which can prevent the door body 2 from opening to a certain extent, and it can also be understood that the larger the angle of the first groove wall 241 is, the better the clamping effect on the airbag 3 is.

On the other hand, the acute included angle between the second groove wall 242 and the horizontal line in the front-rear direction is smaller, so that the second groove wall 242 can be conveniently arranged longer, the contact area with the airbag 3 is increased, and meanwhile, because the included angle is smaller, the clamping force between the second groove wall 242 and the male die is smaller during demolding, so that demolding is easier to realize. Therefore, in principle, it is only necessary to ensure that the second groove wall 242 has an included angle with the horizontal line along the front-back direction, and the smaller the included angle, the better the included angle is, the more easily the demolding is ensured.

And the length of the first groove wall 241 is smaller than that of the second groove wall 242, on one hand, because the acute angle included angle between the first groove wall 241 and the horizontal line along the front-back direction is larger, and the first groove wall 241 is shorter, the area of the male die clamped by the first groove wall 241 is smaller during demoulding, which is more beneficial to demoulding. On the other hand, the second groove wall 242 is longer, so that the airbag 3 is mainly matched and sealed with the second groove wall 242 after being expanded, and the first groove wall 241 assists in clamping the airbag 3.

In the third to fifth embodiments of the door liner 21 of the refrigerator according to the present invention, the door liner itself can generate a closing force, that is, an additional fixing device is not required to fix the door body 2 and the refrigerator body 1, so that a magnetic element is not required to be disposed in the door seal 23, and since a magnetic element is not disposed, on one hand, the cost is reduced, and on the other hand, the thermal conductivity of air is lower than that of a magnetic element, the heat exchange efficiency is lower, and the heat exchange of air in the storage space 12 is not easily performed, so that the temperature in the storage space 12 is increased slowly, thereby improving the heat preservation and sealing effects.

As shown in fig. 6 and 7, in another embodiment of the air bag for a refrigerator according to the present invention, the air bag 3 includes an inner air bag 31, an outer air bag 32 disposed outside the inner air bag 31, and a fixing portion 42 for fixing to the inner container 11.

In the present embodiment, the outer bag 32 may be integrally formed with the fixing portion 42, but may be assembled. The outer airbag 32 further has an installation opening for installing the inner airbag 31 therein, the inner bag 11 is concavely provided with a groove 111 for accommodating the airbag 3, and the bottom of the groove 111 is further concavely provided with a fixing groove matched with the fixing portion 42, in this embodiment, the fixing portion 42 is disposed in a triangular shape, but may have other shapes. When the air bag 3 is installed, the inner container 11 is made of plastic materials, so that the elasticity is good, the fixing part 42 can be directly installed on the fixing groove by overcoming the elastic force of the inner container 11, and the inner container 11 is not needed to be damaged.

When the airbag 3 is not inflated, the airbag 3 is contracted in the groove 111 and is semicircular, so that the door body 2 can be opened and closed smoothly, the surface area of the inner airbag 31 is larger than that of the outer airbag 32, that is, the inner airbag 31 is arranged in the outer airbag 32 in a multi-layer fold shape, when the inner airbag 31 is inflated, because the surface area of the inner airbag 31 is larger, when the door is closed, the larger the area is, the larger the generated pressure is, and therefore, the sealing effect is better.

In the door-open state, the outer wall of the outer airbag 32 adjacent to the liner frame 212 is flush with the inner wall 115 of the inner bag 11, that is, the inner airbag 31 is not inflated and the outer airbag 32 is in an undeformed state. At this time, the door 2 can be opened and closed smoothly without interference from the outer bag 32.

In the present embodiment, the elastic modulus of the outer airbag 32 is smaller than that of the inner airbag 31, and the larger the elastic modulus, i.e., the higher the rigidity, i.e., the less likely to deform, so that the outer airbag 32 is more likely to deform with respect to the inner airbag 31, i.e., the outer airbag 32 is deformed immediately as long as the inner airbag 31 exerts a force on the outer airbag 32.

On the one hand, it is easy to control the amount of inflation of the inner bag 31, and on the other hand, it is possible to prevent damage to the inner bag 31 by over-inflating the inner bag 31. In addition, the outer bag 32 is made of a wear-resistant material, so that the outer bag 32 is less likely to be damaged by friction with the lining frame 212 even in a long-term use.

As shown in fig. 13 and 14, in order to further improve the sealing effect and reduce the heat exchange efficiency, the air pump 5 of the refrigerator according to the present invention fills the air bag 3 by sucking relatively cold air from the inside of the refrigerator, so that the temperature inside the air bag 3 is less different from the temperature inside the storage space 12, even lower than the temperature inside the storage space 12, thereby reducing heat exchange and maintaining the temperature inside the storage space 12 in a relatively stable state.

Specifically, as shown in fig. 1, the refrigerator includes an evaporation chamber 15 located at the rear side of the storage space 12, an evaporator 16 located in the evaporation chamber 15, an air duct cover plate 17 located between the storage space 12 and the evaporation chamber 15, an air pump 5 matched with the air bag 3, and an air duct 6 connected between an air inlet of the air bag and an air inflation inlet of the air pump, wherein the air pump 5 has an air suction port for sucking air from the evaporation chamber 15 or the storage space 12 to inflate the air bag 3.

In this embodiment, the air pump 5 is disposed in the evaporation chamber 15, and the temperature in the evaporation chamber 15 is lower than the temperature in the storage space 12, so that the air pump 5 sucks air from the evaporation chamber 15 and fills the air bag 3, and the temperature in the air bag 3 is lower than the temperature in the storage space 12, thereby reducing heat exchange and improving sealing effect.

The air duct cover 17 has an air outlet 171 and an air return 172 disposed opposite to each other in front and back or left and right, and in this embodiment, the air outlet 171 and the air return 172 are disposed opposite to each other in left and right. The evaporator 16 is disposed between the air outlet 171 and the air return opening 172, and the air pump 5 is disposed between the air outlet 171 and the evaporator 16, that is, the air pump 5 is disposed in a space surrounded by the air duct cover plate 17 on the air outlet 171 side, the evaporator 16, and the inner container 11.

Therefore, on the one hand, the air pump 5 is arranged in the evaporation chamber 15, so that the space of the evaporation chamber 15 can be fully utilized, the space of the storage space 12 is saved, and a hidden design is formed, so that the appearance is attractive. On the other hand, the gas that air pump 5 intakes is the low-temperature low humidity gas after evaporimeter 16 cooling, and when this gas was filled to air pump 5 in, because temperature and humidity all are enough low, consequently, be difficult to appear liquid water to the probability that air duct 6 and air pump 5 freeze has been reduced, in addition air pump 5 is low temperature resistant air pump 5, and to sum up, air pump 5, air duct 6 and gasbag 3 all can work for a long time and be difficult for appearing damaging.

Of course, the air pump 5 and the air duct 6 may be disposed in the storage space 12, and preferably, the air pump 5 is disposed at the rear side of the storage space 12, so that it is not easily seen by the user when the door 2 is opened. The air duct 6 can extend forwards and backwards along the inner wall 115 of the liner 11 to be connected with the air bag inflation inlet, and the air duct 6 is fixed through a fixing clip 9. Or a plastic protective cover with the same color as the inner container 11 is arranged at the outer sides of the air pump 5 and the air duct 6.

The refrigerator is still including connecting the three-way valve 7 between air duct 6 and air pump 5 inflation inlet, three-way valve 7 has first opening 71, the second opening 72 of connecting air duct 6, the carminative third opening 73 of air feed cell 3 of connecting the air pump inflation inlet, be equipped with the solenoid valve in the third opening 73, when air cell 3 aerifys, the solenoid valve is closed, and when air cell 3 exhausts, the solenoid valve is opened and is exhausted through third opening 73.

The inflation and deflation of the air bag 3 are further controlled by setting the three-way valve 7 and controlling the opening and closing of the electromagnetic valve, only the inflation port is required to be arranged on the air bag 3, and the exhaust port is not required to be arranged, so that the structure of the air bag 3 is simpler, and the air bag is convenient to install in the groove 111 of the inner container 11.

Air duct 6 is including the first air duct 61 of connecting the inflation inlet of air pump 5, the second air duct 62 of connecting the air inlet of gasbag 3, the first opening 71 and the second opening 72 of three-way valve 7 are connected respectively between first air duct 61 and second air duct 62, three-way valve 7 set up in the wind channel apron 17 rear side, be about to three-way valve 7 be fixed in on wind channel apron 17, just third opening 73 runs through wind channel apron 17 and communicates storing space 12. Through setting up two air ducts 6, both can make things convenient for three-way valve 7 to be fixed in on wind channel apron 17, also be convenient for third opening 73 intercommunication storing space 12.

On the one hand, realize the hidden design of three-way valve 7, practice thrift the space of storing space 12, on the other hand, during 3 gassing of gasbag, can directly discharge the gas in the gasbag 3 to storing space 12 in, how much gas has in original box 1 promptly, after 3 gassing of gasbag, the gas total amount in the box 1 is unchangeable still to avoid producing the negative pressure, guarantee the normal of the door body 2 and open.

Of course, in other embodiments, the third opening 73 of the three-way valve 7 may also communicate with the evaporation chamber 15 to discharge the gas in the airbag 3 into the evaporation chamber 15, and since the evaporation chamber 15 and the storage space 12 are generally communicated through the air return opening 172, the generation of negative pressure may also be avoided.

In this embodiment, the refrigerator still has the mount 8 that sets up on inner bag 11 rear side wall, and it is used for fixing air pump 5, consequently, sets up air pump 5 in the rearmost side of inner bag 11, can guarantee that the at utmost keeps away from storing space 12, and the produced vibrations of air pump 5 during operation are also less to storing space 12's influence, in addition for reducing the produced vibrations of air pump 5 and noise, can also inhale sound damping material in the cladding of air pump 5 outside.

The refrigerator still has the through-hole (not shown) that runs through recess 111 diapire in order to communicate the foaming layer, air duct 6 sets up in the foaming layer and passes through 3 air inlets of gasbag are connected to the through-hole, for guaranteeing 3 inflation inlets of gasbag and 6 sealing connection of air duct, the front side of air duct 6 still can set up the air cock, and 3 inflation inlets of gasbag can be together fixed through the interior external screw thread of mutually supporting between with the air cock. Or the air duct 6 is directly connected with the inflation port of the air bag 3, and a separate sealing member is arranged on the outer side to prevent air leakage of the air bag 3.

The other end of the air duct 6 is connected to a three-way valve 7 in the evaporation chamber 15, and the structure of the air duct 6 and the inflation inlet of the air bag 3 can be referred to for ensuring the sealing arrangement between the air duct 6 and the three-way valve 7. In this embodiment, in order to prevent the air duct 6 from being bent and smoothly inflate the airbag 3, the refrigerator further includes a plurality of fixing clips 9 disposed at intervals in the front-rear direction to fix the air duct 6, but in other embodiments, an embedded part extending in the front-rear direction may be disposed on the foaming layer to facilitate installation of the air duct 6, and the air duct 6 is not easily bent.

In conclusion, the air pump 5, the air duct 6 and the three-way valve 7 of the present embodiment are all designed in a hidden manner, so that the overall aesthetic degree is improved, and the volume ratio of the storage space 12 is also improved.

As shown in fig. 15, the present invention further provides a control method of a refrigerator, specifically, the refrigerator has a normal air charging mode and a fast air charging mode, and the control method includes:

acquiring the ambient temperature T of the refrigerator, comparing the ambient temperature T with a preset temperature T0, starting a rapid inflation mode when the ambient temperature T is more than or equal to the preset temperature T0, and otherwise, starting a common inflation mode;

the rapid inflation mode specifically includes: the method comprises the steps of obtaining opening information of a door body 2, inflating a sealing air bag 3 between a refrigerator body 1 and the door body 2 after the door body 2 is opened, obtaining pressure p1 in the sealing air bag 3 at the same time, and stopping inflation when the pressure p1 reaches preset pressure p 2;

and acquiring closing information of the door body 2, and continuously inflating the sealed air bag 3 after the door body 2 is closed until the pressure p1 in the sealed air bag 3 reaches the sealing pressure p3.

The rapid inflation mode is mainly characterized in that after the door body 2 is opened, the sealing air bag 3 is pre-filled with certain gas, so that after the door body 2 is closed, the inflation time from the inflation of the sealing air bag 3 to the sealing pressure p3 is shortened, the sealing air bag 3 enters a sealing state in advance, the heat exchange of the storage space 12 is reduced, and the sealing effect is improved.

Generally, a detection device is arranged at the handle position of the refrigerator, when a user touches the handle, the detection device detects the action and feeds the action back to the control unit, and the control unit controls the sealing air bag 3 to exhaust air after acquiring the information, so that the door body 2 is convenient to open.

The quick inflation mode can have two working modes, the first mode is as follows: the sealed air bag 3 is completely exhausted and re-inflated to p2, and the second method is as follows: controlling the exhaust of the sealed air bag 3 and detecting the pressure in real time, and controlling the exhaust valve to close when the pressure is detected to be reduced to p2.

In the second operation mode, because the exhaust speed of the sealed air bag 3 is high, and the sensitivity limit of the detection instrument and the exhaust valve is added, it is difficult to accurately control the exhaust to p2, which is usually lower than p2, and therefore, the sealed air bag 3 still needs to be re-inflated to p2.

Therefore, in the first working mode, the pressure sensor does not need to detect in the exhaust process, and repeated opening of the exhaust valve is avoided.

And when the door body 2 is closed last time, the air pump 5 sucks air from the evaporation chamber 15 for filling, therefore, a certain time interval is provided from the last closing of the door body 2 to the opening of the door body 2, the temperature of the air in the sealed air bag 3 is also increased inevitably, so that the air in the sealed air bag 3 is exhausted first, and the new low-temperature low-humidity air is filled, which is beneficial to reducing heat exchange and improving the sealing effect.

Firstly, judging the size of the environment temperature T and the preset temperature T0 of the refrigerator, if the T is larger than or equal to the T0, the environment temperature T of the refrigerator is higher, the working condition is relatively bad, and therefore, the rapid inflation mode is started, otherwise, the environment temperature T of the refrigerator is lower, the working condition is relatively good, and the common inflation mode is started.

Assuming that the critical pressure of the sealing airbag 3 is p4 when the sealing airbag is in the expansion deformation and the non-deformation state, after the sealing airbag 3 is completely deflated, the sealing airbag 3 is in the wrinkle state and is inflated from the wrinkle state to the wrinkle-free state, at this time, if the sealing airbag 3 is continuously inflated, the material of the sealing airbag 3 is elastically deformed due to the expansion, and p4 is the critical pressure of the material of the sealing airbag 3 when the material is elastically deformed and the non-elastic deformation state.

When the refrigerator is the refrigerator of the first embodiment, p4 is a critical pressure at which the deformation portion 41 of the fixing member 4 is elastically deformed and does not elastically deform, and when the refrigerator is the refrigerator of the second embodiment, p4 is a critical pressure at which the outer bag 32 is elastically deformed and does not elastically deform.

Wherein p4 x 80% < p2 < p4, and the preset pressure p2 is set to a certain range, so that the situation of repeated inflation when the preset pressure p2 is set to a fixed value and the pressure in the sealed air bag 3 is lower than p2 is detected can be avoided, thereby reducing the working times of the air pump 5 and prolonging the service life.

The fast inflation mode further comprises: the method comprises the steps of inflating a sealing airbag 3 between a refrigerator body 1 and a door body 2 after the door body 2 is opened, firstly obtaining the opening time t1 of the door body 2, comparing p1 with p2 when the opening time t1 reaches the preset time t0, and continuing inflating until p2 is reached when p1 is smaller than p2. This is because a certain time is required for inflating the airtight bag 3 to p2, and p2 cannot be reached at the initial stage of inflation, and therefore, it is not necessary to detect the pressure p1 in the airtight bag 3 at the initial stage, thereby reducing the operating frequency of the pressure sensor.

Assuming that the critical pressure when the sealing airbag 3 just generates acting force on the door body 2 or the box body 1 after being inflated is p5, p5 < p3 < p5 × 120%, because it is necessary to make the sealing airbag 3 and the door body 2 or the box body 1 have better sealing effect, p3 is usually made slightly larger than p5, and p3 must not exceed a certain value in order to avoid the door body 2 or the box body 1 from being damaged due to over-expansion of the sealing airbag 3.

The normal inflation mode includes: and acquiring opening information of the door body 2, controlling the sealed air bag 3 to exhaust completely, acquiring closing information of the door body 2 when the door body 2 is closed, and inflating the sealed air bag 3 to enable the pressure p1 to rise from 0 to the sealing pressure p3.

Therefore, the normal inflation mode is increased from 0 to p3, and the quick inflation mode is increased from p2 to p3, so that the inflation time of the quick inflation mode is shorter than that of the normal inflation mode obviously after the door body 2 is closed.

In summary, the refrigerator of the present invention is provided with the fixing member 4 for fixing the airbag 3, wherein the fixing member 4 has the deformation portion 41 covering the outside of the airbag 3 and elastically deforming with the inflation and deflation of the airbag 3, and the fixing portion 42 connected to the deformation portion 41 and fixed to the inner container 11 or the lining frame 212, so that not only the installation and fixation of the airbag 3 are simple, but also the deformation portion 41 can protect the airbag 3 from being damaged easily, and the service life of the airbag 3 is prolonged.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a refrigerator, including the box that has the inner bag, with the box complex door body, the door body has a door lining, form storing space between door lining and the inner bag, the door lining has a door welt and stretches to the inboard lining frame of inner bag, its characterized in that backward from the door welt: the refrigerator also comprises an air bag arranged between the inner container and the lining frame to seal the storage space, a fixing piece for fixing the air bag, and an air pump matched with the air bag, wherein the fixing piece is provided with a deformation part which covers the outer side of the air bag and is elastically deformed along with the air bag in an inflating and deflating manner, and a fixing part which is connected with the deformation part to be fixed on the inner container or the lining frame.

2. The refrigerator of claim 1, wherein: the airbag is fixed on the liner, a groove and a fixing structure are formed in the position, adjacent to the lining frame, of the liner, the airbag is contained in the groove, and the fixing piece is fixed outside the airbag through the matching of the fixing portion and the fixing structure.

3. The refrigerator of claim 2, wherein: the liner is provided with an inner wall adjacent to the lining frame, and the outer wall of the fixed piece adjacent to the lining frame is flush with the inner wall of the liner when the door is opened.

4. The refrigerator of claim 2, wherein: the air bag is an inner air bag, the fixing piece is an outer air bag wrapped on the outer side of the inner air bag, the fixing structure is a fixing groove formed by further sinking from the bottom in the groove, and the part of the outer air bag except the fixing part is semicircular under the initial state of opening the door.

5. The refrigerator of claim 2, wherein: the inner container is provided with an inner container body and a connecting piece fixed at the front end of the inner container body, and the groove and the fixing structure are formed on the connecting piece.

6. The refrigerator of claim 5, wherein: the box body is provided with a shell, the connecting piece is provided with a liner fixed end fixed with the liner body and a shell fixed end fixed with the shell, and the connecting piece, the shell and the liner body form a foaming cavity together.

7. The refrigerator of claim 5, wherein: the connecting piece is annularly arranged along the liner body, the lining frame is formed by protruding backwards from the periphery of the door lining plate, and the air bag is annularly arranged corresponding to the connecting piece and the lining frame; the annular air bag is of a multi-section structure, two adjacent sections are communicated with each other through air holes, and the inner diameter of each air hole is smaller than that of each section of the air bag.

8. The refrigerator of claim 2, wherein: the lining frame is provided with a matching wall matched with the air bag, and the matching wall is concavely provided with a sealing groove matched with the air bag.

9. The refrigerator of claim 1, wherein: the elastic modulus of gasbag is greater than the elastic modulus of deformation portion, deformation portion adopts wear-resisting material.

10. The refrigerator of claim 1, wherein: the refrigerator body is provided with a frame opening, the door body is provided with a sealing part opposite to the frame opening on the outer side of the lining frame, and the sealing part is provided with a door seal.